Solve the following quadratic equation- x 2-10 x -21-0A-3B-7C-3D-7E3 or 7

The correct option is E 3 or 7Let p and q be the roots of the equation. Then, sum of the roots, p + q = 101=10 Product of the roots. pq = 21 so, x can be ei ...

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Question

Solve the following quadratic equation: $x^{2} - 10 x + 21 = 0$

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-7

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3 or 7

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Solution

The correct option is E
3 or 7
Let p and q be the roots of the equation.
Then, sum of the roots, p + q = $- \frac{- 10}{1} = 10$
Product of the roots. pq = 21
so, x can be either 3 or 7

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Solve the following quadratic equation: x2−10x+21=0

The correct option is E 3 or 7Let p and q be the roots of the equation. Then, sum of the roots, p + q = −−101=10 Product of the roots. pq = 21 so, x can be either 3 or 7

Solve the following quadratic equation: $x^{2} - 10 x + 21 = 0$

The correct option is E
3 or 7
Let p and q be the roots of the equation.
Then, sum of the roots, p + q = $- \frac{- 10}{1} = 10$
Product of the roots. pq = 21
so, x can be either 3 or 7